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Finding the Fourth Proportional to 305,874.21, 422,166.80 and 195,422.21

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Solution

The fourth proportional to 305,874.21, 422,166.80 and 195,422.21 is: 269,721.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,874.21 : 422,166.80 = 195,422.21 : x
  2. Step 2: Convert to fraction form
    305,874.21/422,166.80 = 195,422.21/x
  3. Step 3: Cross multiply
    305,874.21x = 422,166.80 × 195,422.21
  4. Step 4: Simplify right side
    305,874.21x = 82,500,769,044.63
  5. Step 5: Solve for x
    x = 82,500,769,044.63/305,874.21
  6. Step 6: Final answer
    x = 269,721.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.